Improvement in globe-valve cocks



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dntesl giant Letters Patent No. 99,651, dated February 8, 1870.y

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it 'may concern Beit known that l, JOSEPH H. DAvIs, of the city and county of Allegheny, and State of Pennsylvania, have invented a certain new and useful article of manufact-ure, viz: Malleable Cast-Iron and Steel Globe- Valve Cocks; and-I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of my invention consists in making a, new article of manufacture, viz: globe-valve cocks, constructed of cast-iron, and subsequently annealed.

To enable others skilled in the-art to-make ,and use my invention, I will proceed to describe its construction. y

Iu the accompanying drawings, which form part of my specification- Figure l is a vertical and longitudinal section of my improvement in globe-valve cocks.

Figure 2 is a side elevation ofthe same.

The body of the globe-valve cock, consisting of the chambers A, B, and B', is made in one piece, and is cast in the usual way; the bore of the chambers A,

B, and B', are all of the same diameter.

The inlet g and outlet h are of such diameter that they will receive pipes, the bore of which may be equal to the opening C for the valve The cap or mounting f of the valve Amay be made of malleable' iron, steel, or brass, and the valve D, and its stem, may also be made of the same metals.

The castings for the several parts of the valve should he made of that quality of pig-iron which is suitable for being converted into malleable cast-iron by any ofthe known methods, which malleable castings may afterwards be subjected to the process of cement-a` tion, and thereby be converted into steel.

The castings, after being properly converted into malleable,cast-iron, are then carefully cleaned by` placing them in a rattling-mill or scouring-mill, such as are used by manutacturers of malleable cast- After being properly cleaned they are Afit-ted up so as to finish and complete the valve in all its parts, as shown in the accompanying drawings.

Now, if it is desirable to convert the entire valve, or any of its parts, into steel, the different parts are separated and placed in suitable converting-chests or chambers, and subjected to the process of cementation, which process is well understood by the skilled metallurgist.

The advantage of constructing globe-valve cocks of malleable cast-iron consistsy First, in making a stronger and more durable globe-valve cocks than can be made of ordinary cast-iron or brass, for the tensile strength of malleable cast-iron is greater than either 4cast-iron or brass.

Second, a globe-valve cock, constructed of malleable cast-iron or steel, may be made much lighter than y when made of ordinary cast-iron or brass, thereby sav ing stock and cost ot' transportation.

Third, a globe-valve cock, constructed oi malleable cast-iron or steel, as ,hereinbefore described, can

-be made cheaper than when made of brass, and is equally susceptible of a tine finish, and at less cost for nishing.

Fourth, globe-valve cocks of every kind, form, and size, may with advantage be constructed of malleable cast-iron or steel, as herein described, which is very dicult to accomplish with ordinary cast-iron.

Fifth, any one or more of the several parts of the globe-valve cock may be'with ease, facility, and cheapness made of steel, by constructing it on them in the manner hereinbefore described.

The skilful mechanic and manufacturer of globevalve cocks will readily see and understand from the foregoing description of my invention, .that my improvement will be of great advantage to the consumer and user of valve-cocks. v

It will be perceived that the excellence of this globe-valve cock depends upon the use of iron that has passed `through the process of annealing, and that for this purpose malleable iron and steel are eqivalents. I, therefore, do not confine myseli` to material in either of these stages of manufacture; but

What I claim, as a new article of manufacture, is- A globe-valve cock, made of cast-iron, and subsequently annealed, all substantially as herein described.

-JOS. H. DAVIS.

\Vitnesses:

A. G.`JoHNsToN, J As. G. THOMPSON. 

